Ceramic glass powder and solar cell metallization paste containing ceramic glass powder

A ceramic glass powder, wherein the ceramic glass powder has a crystallinity of less than 5% (m/m) and comprises a crystallization nucleus forming component and a glass network component;

• wherein the crystallization nucleus forming component comprises 4-5 wt % of zinc oxide (ZnO), 2-3 wt % of magnesium oxide (MgO), 0-5 wt % of sodium oxide (Na2O), 0-8 wt % of zirconium oxide (ZrO2), and 0-5 wt % of copper oxide (CuO);
• and
• wherein the glass network component comprises 0.1-10 wt % of alkali metal oxide, 0.1-5 wt % of aluminum oxide (Al2O3), 10-80 wt % of tellurium oxide (TeO2), 10-80 wt % of lead oxide (PbO), 10-20 wt % of silicon oxide (SiO2), 1-20 wt % of boron oxide (B2O3), 1-30 wt % of bismuth oxide (Bi2O3), and 0-5 wt % of titanium oxide (TiO2), wherein the alkali metal oxide is selected from the group consisting of Li2O, K2O and combinations thereof;
• wherein all the weight percentages are based on the weight of the glass network component.